There are answers I’d give anyone but the reality is that you have to make the decisions. I was a smokeless tobacco user for eight years and I quit cold turkey about four times but the last one stuck because I was finally motivated. My motivation? Money. Quitting dropped my life insurance rates and they checked for nicotine in my system.
Weight loss will be more about diet than cardio. Sure, cardio burns calories but you can’t out work a bad diet.
I understand not being able to afford a bunch of fresh and all natural stuff. I recommend you start tracking your food. Buy a food scale if you want. Track everything. And I mean everything. You have to be aware of what you’re putting in your body so you can make the appropriate adjustments.
You’re 19. You have a long life ahead of you. You don’t have to fix everything by New Years Day. Slow and steady is the way to go. Make positive changes and make them become habit. Build on that as you go.
There’s no magic formula other than consistency. I work with a guy who’s lost 50 lbs in about six months. All he did was start tracking his food. Just being aware can help you make better decisions. He still hasn’t started working out regularly.
You can do it! (just not overnight)
Edit: I think you should start a weight lifting program with a little cardio for general health. Adding muscle will increase your base metabolic rate meaning you’ll burn more calories each day. Muscles also look cool.